Potential advantages of coupling supercritical CO2 Brayton cycle to water cooled small and medium size reactor

Yoon, Hyuk-Jin; Ahn, Yoonhan; Lee, Jeong Ik; Addad, Yacine

doi:10.1016/j.nucengdes.2012.01.014

Cited by 103 publications

(38 citation statements)

References 6 publications

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“…The two last terms in Equation (14) are neglected in the present work because of their much lower values than the first term [29].…”

Section: Thermoeconomic Analysismentioning

confidence: 99%

“…They selected a mixture of CO 2 and some other gases as the working fluid so that the critical point of the working fluid is shifted [13]. Yoon et al concluded that cycle simplicity, high efficiency and compact turbomachinery and heat exchangers are significant advantages for the S-CO 2 cycle [14]. They stated that the S-CO 2 cycle is appropriate for small and medium size water-cooled nuclear reactors.…”

Section: Introductionmentioning

confidence: 99%

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Thermoeconomic Analysis and Optimization of a New Combined Supercritical Carbon Dioxide Recompression Brayton/Kalina Cycle

2016

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Abstract:A new combined supercritical CO 2 recompression Brayton/Kalina cycle (SCRB/KC) is proposed. In the proposed system, waste heat from a supercritical CO 2 recompression Brayton cycle (SCRBC) is recovered by a Kalina cycle (KC) to generate additional electrical power. The performances of the two cycles are simulated and compared using mass, energy and exergy balances of the overall systems and their components. Using the SPECO (Specific Exergy Costing) approach and employing selected cost balance equations for the components of each system, the total product unit costs of the cycles are obtained. Parametric studies are performed to investigate the effects on the SCRB/KC and SCRBC thermodynamic and thermoeconomic performances of key decision parameters. In addition, considering the exergy efficiency and total product unit cost as criteria, optimization is performed for the SCRBC and SCRB/KC using Engineering Equation Solver software. The results indicate that the maximum exergy efficiency of the SCRB/KC is higher than that of the SCRBC by up to 10%, and that the minimum total product unit cost of the SCRB/KC is lower than that of the SCRBC by up to 4.9%.

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“…The two last terms in Equation (14) are neglected in the present work because of their much lower values than the first term [29].…”

Section: Thermoeconomic Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermoeconomic Analysis and Optimization of a New Combined Supercritical Carbon Dioxide Recompression Brayton/Kalina Cycle

2016

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“…The past decade has seen a growing interest on the sc-CO 2 cycle through a significant amount of works that have been carried out in view of analysing these potential advantages for various heat sources such as: low-grade waste heat recovery applications [4], hybrid fuel cell systems [6], concentrated solar [7], nuclear reactors including innovative SMR (small modular reactor) [8], next generation nuclear reactors [5,9], and fusion reactor concepts [10,11]. Appendix A reports the diversity of the sc-CO 2 cycle configurations, operating conditions, as well as component efficiencies that have been used in these works.…”

Section: Introductionmentioning

confidence: 99%

“…In Refs. [5,8,12], component design and performance analyses were initially carried out for a reference cycle. Then, heat transfer and friction correlations, such as those given in Ref.…”

Section: Introductionmentioning

confidence: 99%

Mapping of the thermodynamic performance of the supercritical CO2 cycle and optimisation for a small modular reactor and a sodium-cooled fast reactor

Pham

Alpy

Ferrasse

et al. 2015

Energy

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“…Therefore, the KAIST MMR is a kind of "all-in-one" type super-compact and truck-loadable SMR. There are many supporting studies about the SCO 2 Brayton cycle for nuclear applications [7][8][9]. Several research institutes around the world have already achieved electricity generation with experimental SCO 2 power conversion systems and they are trying to improve the system performances [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

A Conceptual Study of a Supercritical CO2-Cooled Micro Modular Reactor

Hartanto

Moon

et al. 2015

Energies

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A neutronics conceptual study of a supercritical CO 2 -cooled micro modular reactor (MMR) has been performed in this work. The suggested MMR is an extremely compact and truck-transportable nuclear reactor. The thermal power of the MMR is 36.2 MWth and it is designed to have a 20-year lifetime without refueling. A salient feature of the MMR is that all the components including the generator are integrated in a small reactor vessel. For a minimal volume and long lifetime of the MMR core, a fast neutron spectrum is utilized in this work. To enhance neutron economy and maximize the fuel volume fraction in the core, a high-density uranium mono-nitride U 15 N fuel is used in the fast-spectrum MMR. Unlike the conventional supercritical CO 2 -cooled fast reactors, a replaceable fixed absorber (RFA) is introduced in a unique way to minimize the excess reactivity and the power peaking factor of the core. For a compact core design, the drum-type control absorber is adopted as the primary reactivity control mechanism. In this study, the neutronics analyses and depletions have been performed by using the continuous energy Monte Carlo Serpent code with the evaluated nuclear data file ENDF/B-VII.1 Library. The MMR core is characterized in view of several important safety parameters such as control system worth, fuel temperature coefficient (FTC) and coolant void reactivity (CVR), etc. In addition, a preliminary thermal-hydraulic analysis has also been performed for the hottest channel of the Korea Advanced Institute of Science and Technology (KAIST) MMR.

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Potential advantages of coupling supercritical CO2 Brayton cycle to water cooled small and medium size reactor

Cited by 103 publications

References 6 publications

Thermoeconomic Analysis and Optimization of a New Combined Supercritical Carbon Dioxide Recompression Brayton/Kalina Cycle

Thermoeconomic Analysis and Optimization of a New Combined Supercritical Carbon Dioxide Recompression Brayton/Kalina Cycle

Mapping of the thermodynamic performance of the supercritical CO2 cycle and optimisation for a small modular reactor and a sodium-cooled fast reactor

A Conceptual Study of a Supercritical CO2-Cooled Micro Modular Reactor

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